Anionic polysaccharide polymers for viscosified fluids

Abstract

Anionic polysaccharide polymers, derived from kelp may be used in additive compositions, and fluid compositions for viscosifying a base fluid, such as an aqueous-based fluid, a non-aqueous based fluid, and combinations thereof. In a non-limiting embodiment, a breaker additive may be used to break the viscosity of the viscosified fluid composition, which may have or include a breaker agent to break the viscosified fluid composition.

What is claimed is: 
     
         1 . A viscosifying additive composition for a fluid selected from the group consisting of a drilling fluid, a completion fluid, a fracturing fluid, an injection fluid, and combinations thereof; wherein the additive comprises a first anionic polysaccharide polymer and at least one breaker agent; wherein the first anionic polysaccharide polymer is derived from kelp. 
     
     
         2 . The viscosifying additive composition of  claim 1 , wherein the first anionic polysaccharide polymer is alginate. 
     
     
         3 . The viscosifying additive composition of  claim 1 , wherein the at least one anionic polysaccharide polymer is crosslinked with a crosslinker selected from the group consisting of gluteraldehyde, Ca +2 , Al +3 , Fe +3 , Ba +2 , Zr +4 , Sn +4 , Th +4 , U +4 , La +3 , and combinations thereof. 
     
     
         4 . The viscosifying additive composition of  claim 1 , wherein an amount of the first anionic polysaccharide polymer ranges from about 1,000 ppm to about 50,000 ppm of the total fluid. 
     
     
         5 . The viscosifying additive composition of  claim 1 , wherein the at least one breaker agent is selected from the group consisting of an enzyme, a vitamin B, an oxidizer, an acid, and combinations thereof. 
     
     
         6 . A breaker additive composition for reducing the viscosity of a viscosified fluid selected from the group consisting of fracturing fluids, drilling fluids, completion fluids, injection fluids, and combinations thereof; wherein the breaker additive comprises at least two breaker agents; wherein a first breaker agent is a B vitamin; wherein a second breaker agent is different from the first breaker agent; and wherein the second breaker agent is selected from the group consisting of an enzyme, an oxidizer, an acid, and combinations thereof. 
     
     
         7 . The breaker additive of  claim 6 , further comprising solid particles; and wherein the at least one B vitamin is attached to the solid particles. 
     
     
         8 . A viscosified fluid composition that does not include a viscoelastic (VES) surfactant, where the viscosified fluid composition comprises:
 a base fluid selected from the group consisting of fracturing fluids, drilling fluids, completion fluids, injection fluids, and combinations thereof; and   a first anionic polysaccharide polymer derived from kelp.   
     
     
         9 . The viscosified fluid composition of  claim 8 , wherein the first anionic polysaccharide polymer is alginate. 
     
     
         10 . The viscosified fluid composition of  claim 8 , wherein the fluid composition further comprises at least one breaker agent selected from the group consisting of an enzyme, a B vitamin, an oxidizer, an acid, and combinations thereof. 
     
     
         11 . The viscosified fluid composition of  claim 10 , further comprising solid particles; and wherein the at least one breaker agent is at least one B vitamin is configured to be attachable to the solid particles. 
     
     
         12 . The viscosified fluid composition of  claim 10 , wherein the at least one B vitamin is present in an amount ranging from about 0.005 wt % to about 0.1 wt %, based on the fluid composition. 
     
     
         13 . The viscosified fluid composition of  claim 8 , wherein an amount of the first anionic polysaccharide polymer ranges from about 0.1 wt % to about 5 wt % of the total fluid composition. 
     
     
         14 . The viscosified fluid composition of  claim 8 , wherein the viscosified fluid composition is a broken fluid composition. 
     
     
         15 . The viscosified fluid composition of  claim 8 , wherein the first anionic polysaccharide polymer is crosslinked by a crosslinker selected from the group consisting of gluteraldehyde, Ca +2 , Al, Fe +3 , Ba +2 , Zr +4 , Sn +4 , Th +4 , U +4 , La +3 , and combinations thereof. 
     
     
         16 . A method comprising:
 circulating a viscosified fluid composition into a subterranean reservoir wellbore; wherein the viscosified fluid composition comprises an effective amount of at least one polymer derived from kelp.   
     
     
         17 . The method of  claim 16 , wherein the viscosified fluid composition further comprises a breaker agent, and the method further comprises at least partially reducing the viscosity of the viscosified fluid composition with the at least one breaker agent. 
     
     
         18 . The method of  claim 17 , wherein the at least one breaker agent is selected from the group consisting of an enzyme, a B vitamin, an oxidizer, an acid, and combinations thereof. 
     
     
         19 . The method of  claim 16 , wherein the viscosified fluid composition comprises a base fluid selected from the group consisting of fracturing fluids, drilling fluids, completion fluids, injection fluids, and combinations thereof. 
     
     
         20 . The method of  claim 16 , wherein the effective amount of the first anionic polysaccharide polymer ranges from about 0.1 wt % to about 5 wt % of the total fluid composition.